Talib, the team's top cornerback, left Monday night's game against Carolina after his hip tightened up, though he has practiced each day this week on a limited basis. Dennard, who sat out Monday night's game, and Arrington also practiced each day this week.
Gregory, the team's starter alongside Devin McCourty, sat out Monday's game after injuring his thumb in Week 9.
The status of these four will be an area to monitor as the Patriots face the Broncos' top-rated passing attack, which looks likely to have receiver Wes Welker on the field, as he is listed as probable to play after suffering a concussion last Sunday night.
The Patriots also listed running back Leon Washington, who has not played since suffering a Week 5 ankle injury, as questionable.
Tight end Michael Hoomanawanui, who left Monday's game with a knee injury that cost him each day of practice this week, will not play on Sunday.
Linebacker Brandon Spikes, who has been bothered by a knee injury since Monday night, is listed as probable despite practicing on a limited basis each day this week.